Sleeve-valve engine



FER

C. SCH

June 12, 1928.

Patented June 12, 1928.

UNITED STATES PATENT OFFICE.

CHARLES SCHAEFFER, OF PARIS, FRANCE, ASSIGNOB TO SOGIET'E ANONYME DES AN- CIENS ETABLISSEMENTS PANHAB-D & LEVABSOH, OB PARIS, FRANCE.

SLEEVE-VALVE ENGINE.

Application filed May 11, 1926, Serial No. 108,404, and in France June 16, 1925.

It has been remarked that with sleevevalve engines in which the fluids are controlled by steel sleeves, the suction and exhaust ports are subject to clogging, and will become stopped up after a certain time of operation, and this has a marked effect upon the eificiency of the engine and requires frequent inspections.

The present invention relates to a device whereby this disadvantage is obviated and in which the cylinder head is provided with which is inserted into'the ports; the

said ports are slidable upon the said bosses whereby all clogging is obviated.

The appended drawing shows by way of example an embodiment of the said invention.

Fig. l is an elevational view ofthe cylinder head of a sleeve-valve engine according to the invention.

Fig. 2 is a corresponding horizontal section on the line AA of Fig. 1.

Fig. 3 is a vertical section of the sleeve,

and.

Fig. i the corresponding plan View.

Fig. 5 is an elevational view showing the sleeve mounted on the cylinder head.

Fig. 6 a horizontal section on the line .B-B of Fig. 5.

In Fig. l. l is the main body of the cylinder head which comprises the tenons 2 engaging in the ports 3 of the sleeve 4:. To "facilitate its mounting on the cylinder head, said sleeve is preferably recessed at the top 35 at 5. The diameter of the cylinder head adjacent the tenons 2 corresponds to the diameter of the recessed part, and the tenons are slightly set back with reference to the external surface of the sleeve.

The height of the ports 3 is such that the tenons will always remain engaged therein, and will not interfere with the reciprocating motion of: the sleeve, and it will be readily observed. that the disph-rcement of the sleeve relatively to the teuons will prevent all clogging of the said ports.

The said tenons have a further advantage from the fact that they guide the said sleeve in its reciprocatory motion and will counteract all rotation oi? the sleeve due to its uncentered control.

The recess 5 still allows a small thickness of the sleeve which serves to unite the metal parts situated between the ports.

It is also lieasiblcto eliminate the recess 5 and to allow the ports 3 to open at the top of the sleeve whereby the mounting and trimming of the sleeve will be facilitated and the amount of the projection of the tenons will be augmented.

Having thus described my apparatus, what I claim as new therein, and my own invention is In an arrangement adapted to prevent the clogging of the suction and the exhaust 65 ports of sleeve-valve engines the combination or": a sleeve-valve which is slidahle in the cylinder of the engine and in which are CHARLES SCHAEFFER. 

